Device for automatically controlling opening and closing of a vehicle slide door

Abstract

A device for automatically controlling a slide door for a vehicle, wherein the slide door is adapted to open and close along a guide track installed in a vehicle body, the device having a door drive device, a motor load detection device, a door position detection device adapted to detect a position of the slide door guided by the guide track within a range from a position where the slide door is fully opened to a position where the slide door is fully closed, a door speed detection device, a memory device adapted to store the motor load at each position of the slide door of the vehicle standing at a horizontal level, and a motor control device adapted to automatically control power supplied to the motor for moving the slide door based on a difference between a detected motor load and a stored motor load at a corresponding position

Description

[0001]This application is a divisional application of U.S. Ser. No. 09 / 714,436, filed Nov. 17, 2000 now U.S. Pat. No. 6,729,071, which is in turn a continuation of application U.S. Ser. No. 09 / 051,053, filed Mar. 31, 1998 now U.S. Pat. No. 6,164,015, which is the national stage of PCT / JP96 / 02964, filed Oct. 2, 1996.TECHNICAL FIELD[0002]The invention relates to a device for automatically controlling the open-close of a slide door for a vehicle, the slide door installed on a side face of the vehicle and the like in order to automatically open and close the slide door by means of drive sources such as motors and the like.BACKGROUND TECHNOLOGY[0003]A device for automatically controlling the open-close of a slide door of a vehicle has been known, which moves or open and close the slide door so supported as to slide on a side face of the vehicle along its front and back direction by means of motor and the like. According to the device mentioned above, a user intentionally operates an oper...

AI Technical Summary

Benefits of technology

The invention is a device for automatically controlling the open-close of a slide door for a vehicle. The device includes a door drive means, a motor load detection means, a door position detection means, a door speed detection means, a memory means, and a motor control means. The device can detect the position of the slide door and adjust the motor to open or close it based on the detected position and the motor load. The device can also detect the speed of the slide door and adjust the motor to control the movement speed of the door. Additionally, the device can detect the presence of a pinch and make appropriate adjustments to the motor to prevent damage to the door.

Problems solved by technology

However, according to the conventional device described above, a heavy weight of such slide door and resultantly a load used-to drive the heavy slide door is apt to be effected by its position and direction of open and close.

In particular, when the vehicle considerably slants in its front and back direction along the moving track of the slide door, it is necessary to use a very large hosting force of weight of the slide door and a minus load necessary to break such hoisting force, so it has been difficult to design the automatic open-close control device in sufficiently consideration of a safety means for such dangerous situation.

However, such door drive means has small sensibility for small change of load, so it has been difficult to control a large output power in consideration of safety and preventing a pinch in the slide door.

For example, when a chance of exchanging a manual force to an electric power is determined by a door traveled distance, it is very difficult to firmly recognize that manual force moves the slide door.

Such posture of the door widen the door load change width or range or door load itself becomes large, so that it becomes difficult to change a firm manual force for the door to an automatic force.

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